#include "game.h"

#include <SFML/Graphics/RectangleShape.hpp>

constexpr int cell_length = 20;
constexpr int window_side = cell_length * side;

Game::Game()
{
    // Place the player with 10 initial charges onto x: 1, y: 1
    hero = std::make_unique<Hero>(1, 1, 10);

    // Generate level
    level = std::make_unique<Level>();

    main_window.create(sf::VideoMode(window_side, window_side), "SFML-Test Application", sf::Style::Default);
    main_window.setActive();
}

int Game::run()
{
    // On the game loop
    while (main_window.isOpen())
    {
        sf::Event event;
        while (main_window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed)
                main_window.close();

            // Handling keyboard activity
            if (event.type == sf::Event::KeyPressed)
            {
                // Move
                onMoving(event.key.code);
            }
        }

        // Draw level
        renderMap();

        main_window.display();
    }

    return EXIT_SUCCESS;
}

////////////////////////////////////////////////////

Direction Game::getDirection(sf::Keyboard::Key &key) const
{
    switch (key)
    {
    case sf::Keyboard::A:
    case sf::Keyboard::Left:
    case sf::Keyboard::Num4:
        return Direction::Left;

    case sf::Keyboard::W:
    case sf::Keyboard::Up:
    case sf::Keyboard::Num8:
        return Direction::Up;

    case sf::Keyboard::D:
    case sf::Keyboard::Right:
    case sf::Keyboard::Num6:
        return Direction::Right;

    case sf::Keyboard::S:
    case sf::Keyboard::Down:
    case sf::Keyboard::Num2:
        return Direction::Down;

    default:
        return Direction::None;
    }
}

void Game::onMoving(sf::Keyboard::Key &key)
{
    // Determine where to move
    const Direction direction = getDirection(key);

    if (direction == Direction::None)
        return;

    // Save the initial coordinates
    coordinate initial_x, initial_y;
    hero->position(initial_x, initial_y);

    // Try to move hero
    hero->move(direction);

    // Save the new coordinates after moving
    coordinate attempt_x, attempt_y;
    hero->position(attempt_x, attempt_y);

    //////////////////////////

    // If the following cell is water
    if (level->isCellOfType(attempt_x, attempt_y, CellType::Water))
    {
        // Try to use one charge to place a bridge
        if (hero->useCharge())
            level->placeBridge(attempt_x, attempt_y);
        // If hero doesn't have enough charges, we move Hero back
        else
            hero->setPosition(initial_x, initial_y);
    }

    //////////////////////////

    // If the following cell is a charge
    if (level->isCellOfType(attempt_x, attempt_y, CellType::Charge))
    {
        // Hero picks up the charge; remove it from the map
        hero->refillCharges(1);
        level->removeCharge(attempt_x, attempt_y);
    }
}

void Game::renderMap()
{
    const Map &map = level->mapArray();

    coordinate painter_x = 0, painter_y = 0;

    // Brush for cell sprites
    sf::RectangleShape rectangle_brush;
    rectangle_brush.setSize({cell_length, cell_length});
    rectangle_brush.setFillColor(sf::Color::Blue);
    rectangle_brush.setOutlineThickness(0);
    rectangle_brush.setPosition(painter_x, painter_y);

    // Draw map from 2D array
    for (const Row &row : map)
    {
        for (const CellType &cell : row)
        {
            switch (cell)
            {
            case CellType::Ground:
                rectangle_brush.setFillColor(sf::Color(165, 42, 42)); // Brown
                break;
            case CellType::Charge:
                rectangle_brush.setFillColor(sf::Color::Green);
                break;
            case CellType::Bridge:
                rectangle_brush.setFillColor(sf::Color::Black);
                break;
            case CellType::Water:
            default:
                rectangle_brush.setFillColor(sf::Color::Blue);
            }

            main_window.draw(rectangle_brush);

            // Move painter to next cell of row
            painter_x += cell_length;
        }

        // Move painter to next row of the map
        painter_x  = 0;
        painter_y += cell_length;
    }

    // Where is hero
    coordinate hero_x, hero_y;
    hero->position(hero_x, hero_y);

    // Place the hero sprite
    rectangle_brush.setFillColor(sf::Color::White);
    rectangle_brush.setPosition(hero_x * cell_length, hero_y * cell_length);
    main_window.draw(rectangle_brush);
}